BUG or just weird?

There is a rule That does not do what I would like.

The stand alone LT reports: 
Voorbeelden: 
 We spreken over de beukenlaan. x 
 We spreken over de Beukenlaan. ✓ 
(So good, as well as bad example).

But there is only 1 example:

<example correction="Beukenlaan">We spreken over de <marker>beukenlaan</marker>.</example>

If there’s a correction, LT builds a new sentence from that, assuming the sentence is correct after applying the correction.

Stupid me; I overlooked the capital; the thing where it is all about. Spent 2 hours on this…